JPS5855923Y2 - Reciprocating type sediment scraper - Google Patents

Description

[Detailed description of the invention] This invention relates to a scraper for sediment in a sedimentation tank.

Generally, in the method of scraping the sediment accumulated at the bottom of the sedimentation tank in one direction, a plurality of scrapers attached to a thermal chain are moved in the same direction to scrape the sediment.

However, this method has the disadvantage of a complicated structure and high equipment cost.

The purpose of this invention is to solve the above-mentioned problem by providing a reciprocating scraper that scrapes reliably in only one direction and does not scrape completely when returning in the opposite direction.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A known scraper will be briefly described below, and then embodiments of the present invention will be described.

In Figure 1, a is a sedimentation tank, and the sludge that has settled on the horizontal floor is collected by an endless chain C equipped with a scraper b.
The sludge is collected into the sludge pool d.

e is a drive sprocket wheel driven by electric motor f.

This method requires a large number of scrapers B, etc., and is inevitably high in equipment costs.

Figures 2 and below show a sedimentation tank equipped with a sediment scraper according to the present invention.

1 is a raw water pit, and 2 is a settling basin.

3 is a pump pit for discharging water purified by pump 4.

Reference numerals 10 and 10 denote ropes which are respectively wound around winding drums 7 and 7 which are driven by a reduction motor 5 via a chain 6.

The winding drum 7.7 is connected by a drum shaft 9, which is supported on a bearing 8.

Reference numeral 11 denotes a tension adjustment sheave, which allows the tension of the rope 10 to be adjusted appropriately.

12.13 is a guide sheave, which is installed near the bottom of the settling basin.

14 is a scraper body whose top is attached to the rope 10, and 15 is a guide rail embedded in both side walls of the sedimentation tank.

The sludge collected in the sludge reservoir 16 is removed by a submersible pump 17
The sludge is pumped up by the sludge pipe 18 and discharged to an appropriate location by the sludge gutter 20.

The submersible pump 17 is mounted on a pump truck 19 and can be moved laterally on the seal 21.

A scraper 22 is attached to the lower end of the scraper body 14, and scrapes up sediment while being pulled from point E in the direction of arrow A to point D in FIG.

The scraper main body 14 is started and stopped by a limit switch (not shown).

The body 14 is now attached to the rope 10 at its top 29.

23 is rotatably supported by a guide body 25 guided on a guide rail 15 by a support shaft of the scraper body 14.

Reference numeral 24 denotes guide rollers supported by a shaft 26 on the guide frame 25, and in the illustrated example, a total of four guide rollers are attached to the four corners of the guide frame 25.

27 and 28 are stoppers attached to the guide frame 25; 27 is an A direction stopper of the scraper body 14;
Reference numeral 8 designates a stopper in the B direction, which is rotatable around the support shaft 23, but is limited to a position between the stopper 1 and the flange 27, 28.

With the above configuration, when the rope 10 is pulled in the direction A, the scraper main body 14 also rotates around the support shaft 23, and
However, the stopper 27 in the A direction prevents the tilting, and it is pulled in the direction of arrow A while maintaining the vertical position, and the scraper 22 at the bottom scrapes the sludge from the bottom of the pond from point E to the point. It will be done.

When reaching the point, the scraper 22 is pulled back in the direction of arrow B.

At this time, the scraper main body 14 is moved to the stopper 28 in the B direction.
However, since it does not tilt any further, it tilts as shown by the dotted line in FIG. 4 and is pulled back in the direction of arrow B.

At this time, the bottom of the sedimentation tank and the scraper 22 are separated by a gap C (fourth
(Fig.) and do not collect sediment.

In addition, if the bottom of the sedimentation tank is slightly sloped toward the A direction, the raking efficiency will be improved.

As described above, according to the present invention, in order to collect the sediment in the sedimentation basin that accumulates continuously in one place, the scraping by the scraper 22 can be done by simply pulling the scraper main body alternately in opposite directions by the reciprocating mechanism such as the winding drum 7. It can be done smoothly.

In particular, since the scraper main body 14 is tilted during the return stroke and the scraper 22 is separated from the pond bottom, the sediments that have settled at the angle are not disturbed.

According to the device of the present invention, as described above, the precipitate can be collected in one place by the reciprocating scraper.

Moreover, since the structure is simple, there is no malfunction, and parts can be easily replaced and repaired.

Since the structure is extremely simplified compared to the rake rotating type shown in FIG. 1, the equipment cost and operating cost are low, making it extremely economical.

[Brief explanation of drawings]

Figure 1 shows a known scraper, Figure 2 shows a sedimentation tank in which the present invention has been implemented, Figure 3 is a plan view of Figure 2, Figure 4 is an enlarged detailed view of the scraper body, and Figure 5 is the left side of Figure 4. Surface diagram. In the diagram; 1... raw water pit, 2...
・Sedimentation basin, 3...Pump pit, 4...
・Pump, 5... Reduction motor, 6...
Transmission chain, 7... Winding drum, 8...
...Bearing, 9...Drum shaft, 10...
Rope, 11... Adjustment sheave, 12...
・Guide sheave, 13...Guide sheave, 14...
... Scraper body, 15 ... Guide rail, 16 ... Sludge reservoir, 17 ... Submersible pump, 18 ... Sludge lifting pipe, 19.・・・・・・
Pump truck, 20...Sludge gutter, 21...
...Rail, 22...Scraper, 23...
... Support shaft (of the scraper body), 24 ... Guide roller, 25 ... Guide frame, 26 ...
- Shaft (of guide roller), 27...A direction stopper 28...B direction stopper, 29...
...The top (of the main body).

Claims (1)

[Scope of utility model registration request] A support shaft 23 is rotatably supported on a guide frame 25 guided by guide rails 15 embedded in both side walls,
A scraper 22 is attached to the lower part of a scraper main body 14 whose upper end is connected to a reciprocating rope 10, and stoppers 27 and 28 are fixed to the guide frame 25 to keep it vertical when scraping and tilted when pulling back. A reciprocating type raking machine for sediment, which is characterized by: